CN104396162A - Devices and methods for flow control of messages in passive optical network (PON) and methods therein - Google Patents

Devices and methods for flow control of messages in passive optical network (PON) and methods therein Download PDF

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Publication number
CN104396162A
CN104396162A CN201280074065.XA CN201280074065A CN104396162A CN 104396162 A CN104396162 A CN 104396162A CN 201280074065 A CN201280074065 A CN 201280074065A CN 104396162 A CN104396162 A CN 104396162A
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China
Prior art keywords
onu
alarm
flow control
time period
message
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CN201280074065.XA
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Chinese (zh)
Inventor
L.陈
L.塞德
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Telefonaktiebolaget LM Ericsson AB
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Telefonaktiebolaget LM Ericsson AB
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/27—Arrangements for networking
    • H04B10/272—Star-type networks or tree-type networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06—Management of faults, events, alarms or notifications
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06—Management of faults, events, alarms or notifications
    • H04L41/0604—Management of faults, events, alarms or notifications using filtering, e.g. reduction of information by using priority, element types, position or time
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/16—Threshold monitoring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/26—Flow control; Congestion control using explicit feedback to the source, e.g. choke packets
    • H04L47/266—Stopping or restarting the source, e.g. X-on or X-off
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2210/00—Indexing scheme relating to optical transmission systems
    • H04B2210/07—Monitoring an optical transmission system using a supervisory signal
    • H04B2210/071—Monitoring an optical transmission system using a supervisory signal using alarms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/0088—Signalling aspects

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computing Systems (AREA)
  • Small-Scale Networks (AREA)

Abstract

A method in an Optical Line Terminal, OLT, device (110) for transmitting a flow control message to an Optical Network Unit/Terminal, ONU/T, device (130; 140) in a Passive Optical Network, PON, access network (100) is provided. The OLT device (110) is configured to receive alarm and/or Attribute Value Change, AVC, messages from the ONU/T device (130; 140). The OLT device (110) is also configured to temporarily store the alarm and/or AVC messages in a message queue. The OLT device (110) generates a flow control message indicating that the ONU/T device (130; 140) is to stop transmitting alarm and/or AVC messages to the OLT device (110), when the number of alarm and/or AVC messages in the message queue exceeds a first threshold. Then, the OLT device (110) transmits the flow control message to the ONU/T device(s) (130; 140). An OLT device (110) for transmitting a flow control message to a ONU/T device (130; 140), an ONU/T device (130; 140) for receiving a flow control message, and method in an ONU/T device (130; 140) for receiving a flow control message is also provided.

Description

The apparatus and method of the current control of message and method wherein in EPON (PON)
Technical field
Embodiment herein relates to the device in EPON (PON) and method wherein.Specifically, the embodiment of this paper relates to the optical line terminal (OLT) in PON and the flow control messages in optical network unit/terminal (ONU/T) device.
Background technology
EPON (PON) is Access Network, and it brings fiber optic cables to connect up and by all or most of mode signaling to end user, such as provide consumer's bandwidth service to end user.
PON comprises optical line terminal (OLT) device.OLT device is positioned at the central office of service provider.Service provider can operate PON to provide Consumer broadband to serve to end user.PON also comprises some optical network unit/terminal (ONU/T) devices be positioned near end user's terminal (TE) or home network (HN).Comprise between the available OLT device in pon of the optical distributed network (ODN) of optical fiber and splitter and ONU/T device, business is distributed to ONU/T device from OLT device, and vice versa.
Gigabit passive optical network (G-PON) is the PON that can transmit high bandwidth (i.e. about Gigabits per second (Gbps)).Other PON can be such as ATM Passive Optical Network (APON), broadband passive optical network (BPON), Ethernet passive optical network (EPON), gigabit Ethernet EPON (GEPON), 10 gigabit/sec Ethernet passive optical networks (10-GEPON) etc.
But, in the standard of G-PON, define configuration and the operation of G-PON.
In G-PON standard, define the list of alarm and property value change (AVC) message.These alarms and AVC message are generated by the ONU/T device in G-PON, such as there occurs fault or mistake respectively to operator's alarm or instruction in Access Network, or in ONU/T device, there occurs the event (namely state changes event) making ONU/T device change its mode of operation to operator's instruction.Alarm and AVC message are sent to OLT device by ONU/T device.
OLT device is configured to mode in a centralized and receives from ONU/T device and dispose alarm and AVC message.
But for extensive fault or in large scale deployment, namely can be connected in the realization of a large amount of ONU/T device in OLT device, OLT device can receive a large amount of alarm and AVC message simultaneously.This can cause the degradation of OLT device performance.
In standard G984.4 and G988, define the switch fault report controlling the alarm information sent from the User Network Interface (UNI) operating in point-to-point protocol (PTPP) being connected to G-PON control (ARC) process.This ARC process can be abandoned sending alarm information completely or at special time period.
But, first, ARC process be only operated in be connected to G-PON the UNI operating on PTPP on or on some clip, many application simultaneously in ONU/T device also can generate alarm and AVC message, agreement/plain old telephone service (SIP/POTS) application etc. of such as such as session setup.
Next, ARC process also will stop the normal error function of reporting in ONU/ONT device.Normal error function of reporting is important for Access Network management system, to keep monitoring network.Thus ARC process is not suitable for being used in ONU/T device.
Also can consider the rate limit the upstream data traffic from ONU/T device to OLT device or bandwidth control.But, this situation that will only can tackle when single ONU/T device generates a large amount of alarm or AVC message.Under normal circumstances, for extensive fault or in large scale deployment, the alarm generated by single ONU/T device and the quantity of AVC message are limited, and thus, will most possibly drop on below the limit that rate limit or bandwidth control.
Summary of the invention
The object of embodiment improves the performance of optical line terminal (OLT) device herein.
According to the first aspect of this paper embodiment, this object is by realizing for the method in the optical line terminal OLT device to the optical network unit/terminal ONU in passive optical network PON Access Network/T device transmission class control message.OLT device is configured to change AVC message from ONU/T device receiving alarm and/or property value.OLT device is also configured to alarm and/or AVC message to be temporarily stored in message queue.When the quantity of the alarm in message queue and/or AVC message exceedes first threshold, OLT device generates flow control messages, and instruction ONU/T device will stop transmitting alarm and/or AVC message to OLT device.Then, OLT device is to ONU/T device transmission class control message.
According to the second aspect of this paper embodiment, this object is by realizing for the optical line terminal OLT device to the optical network unit/terminal ONU in passive optical network PON Access Network/T device transmission class control message.OLT device is configured to change AVC message from ONU/T device receiving alarm and/or property value.Then alarm and/or AVC message are temporarily stored in message queue by OLT device.OLT device comprises treatment circuit, and it is configured to, when the quantity of the alarm in message queue and/or AVC message exceedes first threshold, generate flow control messages, and instruction ONU/T device will stop transmitting alarm and/or AVC message to OLT device.Treatment circuit is also configured to ONU/T device transmission class control message.
According to the third aspect of this paper embodiment, this object is by realizing for the method received from the optical line terminal OLT device in passive optical network PON Access Network in the optical network unit/terminal ONU/T device of flow control messages.ONU/T device is configured to transmit alarm and/or property value change AVC message in response to the change of alarm event and/or property value to OLT device respectively.ONU/T device receives flow control messages from OLT device, and instruction ONU/T device will stop transmitting alarm and/or AVC message to OLT device.Within the time period, ONU/T device, then respectively in response to the change of alarm event and/or property value, stops transmitting alarm and/or AVC message to OLT device.
According to the fourth aspect of this paper embodiment, this object is realized by the optical network unit/terminal ONU/T device for receiving flow control messages from the optical line terminal OLT device in passive optical network PON Access Network.ONU/T device is configured to transmit alarm and/or property value change AVC message in response to the change of alarm event and/or property value to OLT device respectively.ONU/T device comprises treatment circuit, and it is configured to receive flow control messages from OLT device, and this flow control messages instruction ONU/T device will stop transmitting alarm and/or AVC message to OLT device.Treatment circuit to be also configured within the time period stop transmitting alarm and/or AVC message to OLT device in response to the change of alarm event and/or property value respectively.
By generating flow control messages when exceeding message queue threshold value and to ONU/T device transmission class control message, as mentioned above, enabling ONU/T device postpone special time period and send any alarm and/or AVC message to OLT device.This provides to OLT device the time period that OLT device could not receive or receive only several alarm and/or AVC message, but not has to deal with a large amount of message and may overflow and make the message queue of OLT device performance degradation.
Thus, allow OLT device to dispose that receive in its message queue and alarm that is that come in and/or AVC message in a timely manner.Therefore, the performance of OLT device is improved.
Accompanying drawing explanation
By reference to the following detailed description of its example embodiment of accompanying drawing, the feature and advantage of embodiment will become those skilled in the art easily to be understood, in accompanying drawing:
Fig. 1 is the schematic block diagram of the network architecture reference model of illustration gigabit passive optical network (G-PON) and the embodiment of Access Network;
Fig. 2 is the flow chart of the embodiment of the method described in OLT device;
Fig. 3 is the flow chart of the embodiment of the method described in ONU/T device;
Fig. 4 is schematic combination flow chart and the signaling diagram of the embodiment of the method described in OLT and ONU/T device;
Fig. 5 is the block diagram of the embodiment describing OLT device;
Fig. 6 is the block diagram of the embodiment describing ONU/T device.
Embodiment
Accompanying drawing is schematic and has been simplified for clarity, and they merely show understanding the requisite details of embodiment, and other details has been omitted.In the whole text, identical Reference numeral is used for part that is the same or correspondence or step.
Fig. 1 illustrates G-PON Access Network 100, i.e. EPON (PON) or PON Access Network.The G-PON 100 described in Fig. 1 also can be described as network architecture reference model and Access Network.
G-PON Access Network 100 comprises AN management system 105.AN management system 105 by the service provider of G-PON Access Network 100 for monitoring the performance of G-PON Access Network 100.
G-PON Access Network 100 also comprises OLT device 110.OLT device is usually located at the central office of service provider.OLT device 110 can receive data service from the ONU/T device 130,140 be positioned near end user TE or HN.OLT device 110 also can to ONU/T device 130,140 data services.
G-PON Access Network 100 can comprise ODN 120 and one or more ONU/T device 130,140 further.It is noted that term ONU/T device in this article for referring to ONU device 130 and ONT device 140 one or both of.
ODN 120 can be connected to one or more ONU/T device 130,140 and OLT device 110.ODN 120 comprises optical fiber and splitter, and is configured to provide the optical communication between one or more ONU/T device 130,140 and OLT device 110.Thus ODN 120 is configured to data service to be distributed to one or more ONU/T device 130,140 from OLT device 110, such as, data flow can be shunted to corresponding one or more ONU/T device 130,140 from OLT device 110 by ODN 120.ODN is also configured to data service to propagate into OLT device 110 from one or more ONU/T device 130,140.
ONU 130 can be connected to one or more network terminal (NT).ONU 130 is configured to such as communicate with NT via xDSL interface.Each NT can be connected to again one or more home network (HN) and/or be directly connected to one or more terminal equipment (TE).NT is configured to such as communicate with one or more HN and/or one or more TE via User Network Interface (UNI).ONU 130 also may be defined as the distributed endpoints of termination ODN 120 either party, realize PON agreement and make PON protocol Data Unit (PDU) be adapted to the device of subscriber services interface (UNI of such as HN or TE).
ONT 140 can be connected to one or more HN and/or be directly connected to one or more TE.ONT 140 is configured to such as communicate with one or more HN and/or one or more TE via UNI.ONT 140 also may be defined as any end points in the distributed endpoints of termination ODN 120, realizes PON agreement and make PON PDU be adapted to the single subscriber devices of subscriber services interface (UNI of such as HN or TE).ONT 140 can be counted as the special circumstances of ONU 130.
In FIG, solid line indicate Access Network management system 105 in Access Network, OLT device 110, ODN 120, ONU/T device 130,140, physical link between HN, NT and TE.Further, in FIG, dotted line instruction can transmit the ONT management of control message in G-PON and the communication path of control interface by it.
Modal, ONU/T device 130,140 is configured to report alarm as much as possible and AVC to OLT device 110, that is, via alarm and AVC message report.Then, OLT device 110 allows Access Network management system 105 filtering and process from the alarm of ONU/T device 130,140 and AVC message.Performing this makes the operator of Access Network (such as service provider) can constantly keep monitoring G-PON Access Network 100.In other words, operator expects that OLT device 110 has enough performances to dispose any a large amount of alarm and AVC message under normal circumstances, i.e. a large amount of message.In order to realize this high request to OLT device 110 performance, the hardware cost in OLT device 110 increases.
Fig. 2 shows schematic combination flow chart and the signaling diagram of the exemplary general view of some embodiments be depicted in below with reference to the method in the OLT device 110 described by Fig. 3-6 and ONU/T device 130,140.
Action 201
OLT device 110 can from one or more ONU/T device 130,140 receiving alarm and/or AVC message, and correspondingly (namely as G.984.4 and G.988 described in standard) these message of disposal.At this, do not exceed the first message threshold in OLT device 110, that is, OLT device 110 can dispose the some message in its message queue, and does not have any remarkable degradation impacts to the performance of OLT device 110.This is the normal manipulation mode of OLT device 110.
Action 202-203
In these actions, ONU/T device 130,140 can start to transmit a large amount of alarm and/or AVC message to OLT device 110.Such as when in Access Network 100, some place exists a large amount of fault, or when Access Network 100 comprises a large amount of ONU/T device 130,140, this may occur.
Action 204
OLT device 110 receive a large amount of alarm and/or AVC message the message number in the message queue in OLT device 110 can be made to exceed first threshold.This makes OLT device 110 generate flow control messages according to the embodiment described in action 301 below.
Action 205
In this action, OLT device 110 can according to the embodiment described in action 302 below to ONU/T device 130,140 one or both of transmission class control message.
Action 206
ONU device 130 receives flow control messages according to the embodiment described in action 501 below.When receiving flow control messages in ONU device 130, ONU device 130 can generate random time section.Alternatively, ONU device 130 may comprise time segment value.Then ONU device 130 can start ONU timer according to random time section or according to the time segment value be included in ONU device 130.In certain embodiments, ONU device 130 can according to the embodiment described in action 502 below according to first, second, third or the 4th random time section start ONU timer.
ONU device 130 stops, that is, postpone and transmit any alarm and/or AVC message to OLT device, until ONU timer expiration.
Action 207
ONT device 140 receives flow control messages according to the embodiment described in action 501 below.When receiving flow control messages in ONT device 140, ONT device 140 can generate random time section.Alternatively, ONU device 140 may comprise time segment value.In this action, then ONU device 140 can start ONT timer according to random time section or according to the time segment value be included in ONT device 140.In certain embodiments, ONT device 140 can according to the embodiment described in action 502 below according to first, second, third or the 4th random time section start ONT timer.
ONT device 140 stops, that is, postpone and transmit any alarm and/or AVC message to OLT device, until ONT timer expiration.
Action 208
When ONU timer expiration in ONU device 130, ONU device 130 can respectively in response to alarm event and/or property value change and transmit alarm and/or AVC message to OLT device 110.This can perform according to the embodiment described in action 503 below.
Action 209
When ONT timer expiration in ONT device 140, ONT device 140 can respectively in response to alarm event and/or property value change and restart to transmit alarm and/or AVC message to OLT device 110.This can perform according to the embodiment described in action 503 below.
The embodiment of the method in OLT device 110 is described in referring now to the flow chart described in Fig. 3.Flow chart in Fig. 3 describes for the method in the OLT device 110 to ONU/T device 130, the 140 transmission class control message in G-PON Access Network 100.As mentioned above, OLT device 110 is configured to change AVC message from ONU/T device 130,140 receiving alarm and/or property value.OLT device 110 is configured to alarm and/or AVC message to be temporarily stored in message queue.
Fig. 3 is the illustrative example of detailed exemplary sexual act or the operation can taked by OLT device 110.Should be realized that, provide flow chart as just an example, and OLT device 110 can be configured to perform any demonstration movement provided herein or operation.It should further be appreciated that, below the action of illustration or operation be only example, thus not necessarily for the everything that will perform or operation.Should further be recognized that these actions or operation can any combination or the execution of any applicable order.And the flow chart in Fig. 3 comprises following action.
Action 301
When the quantity of the alarm in message queue and/or AVC message exceedes first threshold, OLT device 110 generates flow control messages, and instruction ONU/T device 130,140 will stop transmitting alarm and/or AVC message to OLT device 110.
ONU/T device 130,140 should be interpreted as at least one ONU/T device 130,140 or one or more ONU/T device 130,140 at this.Flow control messages can be such as physical layer operations, administer and maintain PLOAM message.It is noted that statement " exceedes first threshold " and can be interpreted as increasing to more than first threshold or being reduced to below first threshold at this, depend on the specific detail of specific implementation.First threshold also can be called as the first message queue threshold value, upper message queue threshold value or similar.
In certain embodiments, the alarm in the queue of OLT device 110 detect-message and/or AVC message come from which ONU/T device 130,140.At this, as an option, the ONU/T device 130,140 that OLT device 110 can indicate alarm and/or AVC message in flow control messages to come from.In this way, OLT device 110 can for stopping or postponing the specific ONU/T device 130,140 transmitting alarm and/or AVC message to OLT device 110.This can be such as ONU bitmap or ONU-ID bitmap by using the identity of each ONU/T device 130,140 to perform the identity of ONU/T device 130,140, the ONU bitmap field of such as instruction in table 1 or table 2.
In certain embodiments, OLT device 110 indicates ONU/T device 130,140 will stop transmitting the lower limit of the time period of the time period of alarm and/or AVC message, the upper limit of time period or the lower limit of time period and the upper limit to OLT device 110 in flow control messages.ONU/T device 130,140 will stop these limit of the time period of transmitting alarm and/or AVC message also can be called as flow control timer, and can indicate in flow control messages like this, such as, as shown in table 1 or table 2.In this way, OLT device 110 adjustable ONU/T device 130,140 should stop or postponing how long transmit alarm and/or AVC message to OLT device 110.These time periods are configurable in OLT device 110, or are dynamically determined based on any amount of parameter (size of message in such as such as message queue) in OLT device 110 by OLT device 110.
Action 302
In order to notify that ONU/T device 130,140 stops transmitting alarm and/or AVC message to OLT device 110, OLT device 110 is to ONU/T device 130,140 transmission class control message.
In certain embodiments, OLT device 110 only sends flow control messages to ONU/T device 130, the 140 i.e. alarm/AVC message source ONU/T device 130,140 certainly sending alarm and/or AVC message.This performs by the ONU/T device 130,140 that only addressing alarm and/or AVC message in flow control messages comes from.This also can be called as herein directly or unicast messages.
Alternatively, in certain embodiments, OLT device 110 is passed through to being connected to all of OLT device 110 or some of them ONU/T device 130,140 broadcasting stream control message, such as by sending out flow control messages to all ONU/T devices 130,140 respectively on all PON interfaces or on same PON interface, carry out transmission class control message such as, this can work as that OLT device 110 indicated alarm and/or AVC message to come from flow control messages ONU/T device 130,140 time perform.This also can be called as broadcast or multicast message herein.
Such as, the message structure of flow control messages such as can as defined in following table 1 (being similar to the general PLOAM message structure defined in G.987.3 standard):
Table 1
Eight hytes row in table 1 to be defined in flow control messages and can how many eight hytes of usage data and which eight hyte of data by which content in flow control messages can be used, i.e. arrangement of ideas in flow control messages.Content row in table 1 define the dissimilar content that can be included in flow control messages.Describe row illustrate dissimilar content in flow control messages and it what can be used for.
In another example, the message structure of flow control messages such as can as defined in following table 2 (being similar to the general PLOAM message structure defined in G.984.3 standard):
Table 2
Eight hytes row in table 2 to be defined in flow control messages and can how many eight hytes of usage data and which eight hyte of data by which content in flow control messages can be used, i.e. arrangement of ideas in flow control messages.Content row in table 2 define the dissimilar content that can be included in flow control messages.Describe and arrange the dissimilar content that describes in flow control messages and it can be used for anything.
Action 303
In this optional actions, and according to some embodiments, OLT device 110 can repeat to ONU/T device 130,140 transmission class control message, until exceed Second Threshold from the alarm of ONU/T device 130,140 and/or the quantity of AVC message in message queue, it should be noted that at this, statement " exceeding Second Threshold " can be interpreted as increasing to more than Second Threshold or being reduced to below Second Threshold, depends on the specific detail of specific implementation.First threshold also can be called as the second message queue threshold value, lower message queue threshold value or similar.In certain embodiments, this also can regularly perform.
This can guarantee that final message number in the message queue of OLT device 110 will drop on below the message number that is considered suitable for and is convenient to any degradation reducing or eliminating OLT device 110 performance.
In order to perform the method action for transmission class control message, OLT device 110 comprises the following layout described in Fig. 4.Fig. 4 shows the schematic block diagram of the embodiment of OLT device 110.
As mentioned above, OLT device 110 is configured to ONU/T device 130, the 140 transmission class control message in G-PON Access Network 100.OLT device 110 is configured to further from ONU/T device 130,140 receiving alarm and/or AVC message.OLT device 110 is also configured to alarm and/or AVC message to be temporarily stored in message queue further.
OLT device 110 comprises treatment circuit 502, and it is configured to generate flow control messages, and instruction ONU/T device 130,140 will stop transmitting alarm and/or AVC message to OLT device 110.This quantity when the alarm in message queue and/or AVC message performs when exceeding first threshold.OLT device 110 is configured to transmit to ONU/T device 130,140 flow control messages generated.This such as can perform via optical transceiver circuit 501.
Treatment circuit 502 can be configured to alarm in detect-message queue further and/or AVC message comes from which ONU/T device 130,140.In certain embodiments, OLT device 110 then can only to ONU/T device 130, the 140 transmission class control message that alarm and/or AVC message come from.Alternatively, treatment circuit 502 can be configured to the ONU/T device 130,140 that indicates alarm and/or AVC message to come from flow control messages.
In certain embodiments, treatment circuit 502 can be configured to indicate the time period in flow control messages.Time period can be the lower limit of time period, the upper limit of time period, the lower limit of time period and the upper limit.Time period is the time period that ONU/T device 130,140 will stop transmitting to OLT device 110 alarm and/or AVC message.
In certain embodiments, treatment circuit 502 can be configured to repetition transmission class control message, until exceed Second Threshold from the alarm of ONU/T device 130,140 and/or the quantity of AVC message in message queue.Treatment circuit 502 can be configured to regularly perform and repeats to transmit.It is noted that statement " exceedes Second Threshold " at this and can be interpreted as increasing to more than Second Threshold or being reduced to below Second Threshold, depend on realization.
In certain embodiments, treatment circuit 502 can be configured to all ONU/T devices 130, the 140 broadcasting stream control message to being connected to OLT device 110.Advantageously, this performs when treatment circuit 502 is also configured to indicate alarm and/or AVC message to come from flow control messages ONU/T device 130,140.
Embodiment herein for transmission class control message in OLT device 110 realizes by the computer program code of one or more processor (treatment circuit 502 in all OLT device 110 as depicted in Figure 5) together with function and action for performing embodiment herein.Program code above-mentioned also can be provided as computer program, and such as form is carrying performs the computer program code of embodiment herein data medium when being loaded in OLT device 110.An examples of such carriers can be the form of CDROM dish.But other data medium such as memory stick is also feasible.Computer program code also can be provided as the pure program code on server, and downloads to OLT device 110.
OLT device 110 can comprise the memory 503 comprising one or more memory cell further.Memory 360 can be arranged to for storing data, the data flow of reception and message, such as such as from alarm and the AVC message of ONU/T device 130,140, to perform method herein when performing in OLT device 110.
Those of skill in the art also will appreciate that, above-described treatment circuit 502 and memory 503 can refer to the combination of analog circuit and digital circuit, and/or being configured with one or more processors of software and/or firmware (such as storing in memory), software and firmware perform as mentioned above when being run by one or more processor (such as treatment circuit 502).One or more processor in these processors and other digital hardware can be included in single asic (ASIC), or several processor and various digital hardware can be distributed in the middle of several independent assembly, no matter independent encapsulation is still assembled in SOC (system on a chip) (SoC).
The embodiment of the method in ONU/T device 130,140 is described referring now to the flow chart described in Fig. 5.Flow chart in Fig. 5 describes the method for receiving from the OLT device 110 in G-PON Access Network 100 in the ONU/T device 130,140 of flow control messages.ONU/T device 130,140 is configured to transmit alarm and/or AVC message in response to the change of alarm event and/or property value to OLT device 110 respectively.
Fig. 5 is the illustrative example of detailed exemplary sexual act or the operation can taked by ONU/T device 130,140.Should be realized that, provide flow chart as just an example, and ONU/T device 130,140 can be configured to perform any demonstration movement provided herein or operation.
It should further be appreciated that, below the action of illustration or operation be only example, thus not necessarily for the everything that will perform or operation.Should further be recognized that these actions or operation can perform in any combination.And the flow chart in Fig. 5 comprises following action, and can realize for any embodiment cited above and below, or with any combination with those.
Action 501
In this action, ONU/T device 130,140 receives flow control messages from OLT device 110.Flow control messages instruction ONU/T device 130,140 will stop transmitting alarm and/or AVC message to OLT device 110.If flow control messages is directed message, namely ONU/T device 130,140 is addressed directly to, then ONU/T device 130,140 can correspondingly receive and dispose flow control messages, if flow control messages is broadcast, namely be addressed to the some or all of ONU/T devices 130,140 in Access Network 100, then ONU/T device 130,140 can check whether the ONU/T-ID be included in flow control messages corresponds to the ONU/T-ID of ONU/T device 130,140.If this is true, then ONU/T device 130,140 can correspondingly receive and dispose flow control messages.If this is false, then ONU/T device 130,140 this flow control messages discardable.
Action 502
In this action, within the time period, ONU/T device 130,140, respectively in response to the change of alarm event and/or property value, stops (namely postponing) to transmit alarm and/or AVC message to OLT device 110.It is noted that stopping transmission alarm and/or AVC message also to can be described as suppresses or postpone to transmit alarm and/or AVC message.
In certain embodiments, ONU/T device 130,140 comprises the time segment value that will be used as the time period, that is, the time period can pre-determine and configure in ONU/T device 130,140.
In certain embodiments, ONU/T device 130,140 generates the first random time section that will be used as the time period.Can be performed this, the time period of the ONU/T device 130,140 in G-PON Access Network 100 is not all expired simultaneously, but on concrete time span random dispersion.This contributes to alleviating the alarm of OLT device 110 and/or the congested of AVC message.
According to an example embodiment, prescribe a time limit when flow control messages comprises the lower of time period, ONU/T device 130,140 can generate the second random time section that will be used as the time period.This second random time section such as can between the upper limit being configured in the time period in ONU/T device 130,140 and the lower limit of time period.
According to another example embodiment, prescribe a time limit when flow control messages comprises the upper of time period, ONU/T device 130,140 can generate the 3rd random time section that will be used as the time period.This 3rd random time section such as can between 0 and the upper limit being included in the time period in flow control messages.
According to another example embodiment, when flow control messages comprise the time period lower limit and upper in limited time, ONU/T device 130,140 can generate the 4th random time section that will be used as the time period.This 4th random time section such as can between the lower limit being included in the time period in flow control messages and the upper limit.
These random time sections generated also can be called as pseudorandom timer time section.Advantageously, these random time sections provide the temporal improvement distribution of alarm in G-PON Access Network 100 and/or AVC message, and what which reduce in OLT device 110 is congested.
Action 503
In this optional actions, when the time period expires, ONU/T device 130,140 can, respectively in response to the change of alarm event and/or property value, restart to transmit alarm and/or AVC message to OLT device 110.
This will make ONU/T device 130,140 get back to normal manipulation mode or state, and wherein ONU/T device 130,140 starts to transmit alarm and/or AVC message in a usual manner again.
In order to perform the method action for receiving flow control messages, ONU/T device 130,140 comprises the following layout described in Fig. 6.Fig. 6 shows the schematic block diagram of the embodiment of ONU/T device 130,140.
ONU/T device 130,140 is configured to receive flow control messages from the OLT device 110 G-PON Access Network 100.ONU/T device 130,140 is also configured to transmit alarm and/or AVC message in response to the change of alarm event and/or property value to OLT device 110 respectively.
ONU/T device 130,140 comprises treatment circuit 602, and it is configured to receive flow control messages from OLT device, and instruction ONU/T device 130,140 will stop transmitting alarm and/or AVC message to OLT device 110.This such as can perform via optical transceiver circuit 501.Treatment circuit 602 to be also configured within the time period respectively in response to alarm event and/or property value change and stop transmitting alarm and/or AVC message to OLT device 110.
In certain embodiments, treatment circuit 602 can be configured to: the time period expire the time-division not in response to alarm event and/or property value change and restart to transmit alarm and/or AVC message to OLT device 110.
In certain embodiments, treatment circuit 602 can be configured to generate and will be used as the first random time section of time period, is configured to stop transmitting alarm and/or AVC message to OLT device 110 in response to the change of alarm event and/or property value respectively at this time period treatment circuit 602.Alternatively, treatment circuit 602 may be configured with the time period that will be used as the time period.
In certain embodiments, prescribe a time limit when the flow control messages from OLT device 110 comprises the lower of time period, treatment circuit 602 can be configured to generate the first random time section that will be used as the time period.First random time section can between the upper limit being configured in the time period in ONU/T device 130,140 and the lower limit of time period.
In certain embodiments, prescribe a time limit when flow control messages comprises the upper of time period, treatment circuit 602 can be configured to generate the 3rd random time section that will be used as the time period.3rd random time section can between 0 and the upper limit being included in the time period in flow control messages.
In certain embodiments, when flow control messages comprise the time period lower limit and upper in limited time, treatment circuit 602 can be configured to generate the 4th random time section that will be used as the time period.4th random time section is between the lower limit being included in the time period in flow control messages and the upper limit.
Embodiment herein for receiving flow control messages in ONU/T device 130,140 realizes by the computer program code of one or more processor (treatment circuit 602 in the ONU/T device 130,140 described in such as Fig. 6) together with function and action for performing embodiment herein.Program code above-mentioned also can be provided as computer program, and such as form is carrying performs the computer program code of embodiment herein data medium when being loaded in ONU/T device 130,140.An examples of such carriers can be the form of CDROM dish.But other data medium such as memory stick is also feasible.Computer program code also can be provided as the pure program code on server, and downloads to ONU/T device 130,140.
ONU/T device 130,140 can comprise the memory 603 comprising one or more memory cell further.Memory 360 can be arranged to for storing data, the data flow of reception and message, such as, from the flow control messages of OLT device 110, to perform method herein when performing in ONU/T device 130,140.
Those of skill in the art also will appreciate that, above-described treatment circuit 602 and memory 603 can refer to the combination of analog circuit and digital circuit, and/or being configured with one or more processors of (such as storing in memory) software and/or firmware, software and firmware perform as mentioned above when being run by one or more processor (such as treatment circuit 602).One or more processor in these processors and other digital hardware can be included in single asic (ASIC), or several processor and various digital hardware can be distributed in the middle of several independent assembly, no matter independent encapsulation is still assembled in SOC (system on a chip) (SoC).
It is noted that embodiment described herein is by making can energy impulse flattening the business improved on GPON link of the alarm that can occur in Access Network 110 and AVC message.This relaxes the requirement for buffer and processing time in OLT device 110.OLT device 110 thus can utilize can performance process may the grouping of prior other control plane, or OLT device 110 can be equipped with more cheap processor or treatment circuit 502.
Embodiment is herein not limited to above-described preferred embodiment.Various replacement, amendment and equivalents can be used.Therefore, embodiment above should not be regarded as restriction.
Abbreviation:
AN access node
ARC switch fault report controls
ASIC application-specific integrated circuit (ASIC)
AVC property value changes
G-PON gigabit passive optical network
HN home network
The NT network terminal
ODN Light distribation node
ONU/T optical network unit/terminal
OLT optical line terminal
PLOAM physical layer operations, to administer and maintain
PDU protocol Data Unit
POTS plain old telephone service
PTPP point-to-point protocol
SIP Session initiation Protocol
SoC SOC (system on a chip)
UNI User Network Interface
DSL digital subscriber line.

Claims (26)

1. one kind for the optical network unit/terminal ONU/T device (130 in passive optical network PON Access Network (100); 140) method in the optical line terminal OLT device (110) of transmission class control message, described OLT device (110) is configured to from described ONU/T device (130; 140) receiving alarm and/or property value change AVC message, and described alarm and/or AVC message are temporarily stored in message queue, and described method comprises:
When the quantity of the alarm in described message queue and/or AVC message exceedes first threshold, generate (301) flow control messages, indicate described ONU/T device (130; 140) to stop transmitting alarm and/or AVC message to described OLT device (110); And
To described ONU/T device (130; 140) (302) described flow control messages is transmitted.
2. the method for claim 1, wherein said generation (301) comprises further and detects described alarm in described message queue and/or which ONU/T device (130 is AVC message come from; , and wherein said transmission (302) comprises only to the described ONU/T device (130 that described alarm and/or AVC message come from further 140); 140) described flow control messages is transmitted.
3. the method for claim 1, wherein said generation (301) comprises further and detects described alarm in described message queue and/or which ONU/T device (130 is AVC message come from; , and the described ONU/T device (130 indicating described alarm and/or AVC message to come from described flow control messages 140); 140).
4. method as claimed in claim 3, wherein uses the identity of each ONU/T device to indicate described ONU/T device (130; 140), wherein the identity of ONU/T device is ONU-ID bitmap.
5. the method according to any one of claim 1-4, wherein said generation (301) comprises further: in described flow control messages, indicate described ONU/T device (130; 140) to stop transmitting the lower limit of time period of the time period of alarm and/or AVC message, the upper limit of time period or the lower limit of time period and the upper limit to described OLT device (110).
6. the method according to any one of claim 1-5, comprises further:
The transmission of-repetition (303) described flow control messages, until from described ONU/T device (130 in described message queue; 140) till the quantity of alarm and/or AVC message exceedes Second Threshold.
7. the method according to any one of claim 1,3-6, wherein said transmission (302) comprises all described ONU/T device (130 to being connected to described OLT device (110); 140) described flow control messages is broadcasted.
8. the method according to any one of claim 1-7, wherein said flow control messages is physical layer operations, administers and maintains PLOAM message.
9. one kind for the optical network unit/terminal ONU/T device (130 in passive optical network PON Access Network (100); 140) the optical line terminal OLT device (110) of transmission class control message, described OLT device (110) is configured to from described ONU/T device (130; 140) receiving alarm and/or property value change AVC message, and described alarm and/or AVC message are temporarily stored in message queue, and described OLT device (110) comprising:
Treatment circuit (502), is configured to, when the quantity of the alarm in described message queue and/or AVC message exceedes first threshold, generate flow control messages, indicate described ONU/T device (130; 140) to stop transmitting alarm and/or AVC message to described OLT device (110), and to described ONU/T device (130; 140) described flow control messages is transmitted.
10. OLT device as claimed in claim 9, wherein treatment circuit (502) is configured to detect described alarm in described message queue and/or which ONU/T device (130 is AVC message come from further; 140), and only to the described ONU/T device (130 that described alarm and/or AVC message come from; 140) described flow control messages is transmitted.
11. OLT device as claimed in claim 9, wherein treatment circuit (502) is configured to detect described alarm and/or which ONU/T device (130 is AVC message come from further; , and the described ONU/T device (130 indicating described alarm and/or AVC message to come from described flow control messages 140); 140).
12. OLT device according to any one of claim 9-11, wherein treatment circuit (502) is configured to further: in described flow control messages, indicate described ONU/T device (130; 140) to stop transmitting the lower limit of time period of the time period of alarm and/or AVC message, the upper limit of time period or the lower limit of time period and the upper limit to described OLT device (110).
13. OLT device according to any one of claim 9-12, wherein said treatment circuit (502) is configured to repeat to transmit described flow control messages further, until from described ONU/T device (130 in described message queue; 140) till the quantity of alarm and/or AVC message exceedes Second Threshold.
14. OLT device according to any one of claim 9,11-13, wherein said treatment circuit (502) is configured to ONU/T device (130 described in all or some of them being connected to described OLT device (110) further; 140) described flow control messages is broadcasted.
15. 1 kinds for receiving the optical network unit/terminal ONU/T device (130 of flow control messages from the optical line terminal OLT device (110) in passive optical network PON Access Network (100); 140) method in, described ONU/T device (130; 140) be configured to transmit alarm in response to the change of alarm event and/or property value to described OLT device (110) respectively and/or property value changes AVC message, described method comprises:
Receive (401) flow control messages from described OLT device (110), described flow control messages indicates described ONU/T device (130; 140) to stop transmitting alarm and/or AVC message to described OLT device (110); And
Within the time period, stop (402) to transmit alarm and/or AVC message to described OLT device (110) respectively in response to the change of alarm event and/or property value.
16. methods as claimed in claim 15, comprise further:
When the described time period expires, restart (403) respectively in response to the change of alarm event and/or property value and transmit alarm and/or AVC message to described OLT device (110).
17. methods according to any one of claim 15-16, wherein said stopping (402) described transmission comprises the first random time section generating and will be used as the described time period further.
18. methods according to any one of claim 15-17; wherein prescribe a time limit when described flow control messages comprises the lower of described time period; described stopping (402) described transmission comprises the second random time section generating and will be used as the described time period further, and the second random time section is being configured in described ONU/T device (130; 140) between the described upper limit of the described time period in and the described lower limit of described time period.
19. methods according to any one of claim 15-18, wherein prescribe a time limit when described flow control messages comprises the upper of described time period, described stopping (402) described transmission comprises the 3rd random time section generating and will be used as the described time period further, and the 3rd random time section is between 0 and the described upper limit being included in the described time period in described flow control messages.
20. methods according to any one of claim 15-19, wherein when described flow control messages comprises lower limit and the upper limit of described time period, described stopping (402) described transmission comprises the 4th random time section generating and will be used as the described time period further, and the 4th random time section is between the described lower limit being included in the described time period in described flow control messages and the upper limit.
21. 1 kinds for receiving the optical network unit/terminal ONU/T device (130 of flow control messages from the optical line terminal OLT device (110) in passive optical network PON Access Network (100); 140), described ONU/T device (130; 140) be configured to transmit alarm in response to the change of alarm event and/or property value to described OLT device (110) respectively and/or property value changes AVC message, described ONU/T device (130; 140) comprising:
Treatment circuit (602), be configured to receive flow control messages from described OLT device (110), described flow control messages indicates described ONU/T device (130; 140) to stop transmitting alarm and/or AVC message to described OLT device (110); And
Stop in response to the change of alarm event and/or property value respectively transmitting alarm and/or AVC message to described OLT device (110) within the time period.
22. ONU/T devices as claimed in claim 21, wherein said treatment circuit (602) is configured to further: when the described time period expires, and restarts respectively to transmit alarm and/or AVC message to described OLT device (110) in response to the change of alarm event and/or property value.
23. methods according to any one of claim 21-22, wherein said treatment circuit (602) is configured to generate the first random time section that will be used as the described time period further.
24. methods according to any one of claim 21-23; wherein said treatment circuit (602) is configured to further: generate the first random time section that will be used as the described time period in limited time when described flow control messages comprises the lower of described time period, the first random time section is being configured in described ONU/T device (130; 140) between the upper limit of the described time period in and the described lower limit of described time period.
25. methods according to any one of claim 21-24, wherein said treatment circuit (602) is configured to further: prescribe a time limit when described flow control messages comprises the upper of described time period, generation will be used as the 3rd random time section of described time period, and the 3rd random time section is between 0 and the described upper limit being included in the described time period in described flow control messages.
26. methods according to any one of claim 21-25, wherein said treatment circuit (602) is configured to further: when described flow control messages comprises lower limit and the upper limit of described time period, generation will be used as the 4th random time section of described time period, and the 4th random time section is between the described lower limit being included in the described time period in described flow control messages and the upper limit.
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